Here’s this firearms first outing using cast powder coated Lee c309-160-r (166gr actual) with 22.5gr of IMR-3031.
Range was 100 yards.
Muzzle velocity average 1861fps.
The usual group with this 20” barrel using 150gr jacketed stuff at 2018fps is not tighter than 1 1/2” and zeroed at 100 yards. So I’m encouraged!